.input-group-addon {
  resize: both;
  padding: 0.375rem 0.75rem;
  margin-bottom: 0;
  font-weight: 400;
  line-height: 1.5;
  color: #495057;
  text-align: center;
  background-color: #e9ecef;
  border: 1px solid #ced4da;
}

.rich-text-editor {
  flex: 1 1 0%;
}
